POWER SUPPLY CIRCUIT AND SEMICONDUCTOR DEVICE

摘要

An output transistor coupled between an input terminal where an input voltage is input and an output terminal where an output voltage is output; an error amplifier configured to generate a first error signal and a second error signal based on a voltage in accordance with the output voltage and a reference voltage, and to output the first error signal to a gate terminal of the output transistor; an anti-overshoot circuit coupled to the output terminal and controlled by the second error signal; an output transistor control part configured to add a control signal based on a first current in accordance with an AC component of the output voltage to the first error signal; and a sensitivity adjustment part configured to decrease the first current based on the second error signal when the output voltage is higher than a certain voltage.

主权项

1. A power supply circuit, comprising:
a first transistor coupled between an input terminal where an input voltage is input and an output terminal where an output voltage is output; an error amplifier configured to generate a first error signal and a second error signal based on a difference voltage between a voltage in accordance with the output voltage and a reference voltage, and to output the first error signal to a gate terminal of the first transistor; a control circuit configured to add a control signal based on a first current in accordance with an AC component of the output voltage to the first error signal; and an adjustment circuit configured to decrease the first current based on the second error signal when the output voltage is higher than a certain voltage.